Park Tool CT-3. 3 5-12 Speed Chain Tool No bike shop or garage would be complete without Park Tool's Chain Tool. Made from investment cast steel, the Chain Tool provides the force needed to remove chain pins on all 5 to 12-speed chains including 1/8" and 3/16" single-speed chains and SRAM 12-speed AXS chains. The Chain Tool is a must-have for any home mechanic! Features Fine thread and comfortable size for easy removal of even the toughest chain pins Intended for both single-speed and derailleur type chains Sliding shelf to accommodate any width chain Also works on "half link" chain Replaceable pins available Related Articles: CHAIN LENGTH SIZING CHAIN LENGTH SIZING: CAMPAGNOLO(R) CHAIN REPLACEMENT: DERAILLEUR BIKES CHAIN REPLACEMENT: SINGLE SPEED BIKESManufacturer's Part No: CT-3. 3 | Park Tool | Ct-3. 3 5-12 Speed Chain Tool Ct-3. 3, 5 Speed To 12 Speed